Motorbike



FIG. 1 is a front and left side perspective view showing my new design.

FIG. 2 is a left side view thereof.

FIG. 3 is a right side view thereof.

FIG. 4 is a top view thereof.

FIG. 5 is a front view thereof; and,

FIG. 6 is a rear view thereof.

The portions of the motorbike shown in broken lines form no part of the claimed design. 

The ornamental design for a motorbike, as shown and described. 